Synthesis

Details Synthesis Synthesis

C - Chemistry, Metallurgy

07

D

260/309.1, 260/2

C07D 275/06 (2006.01) C07D 279/02 (2006.01) C07D 417/10 (2006.01)

Patent

CA 1110239

Abstract of the Disclosure In one aspect, this invention relates to a method of synthesizing certain 3-(4'-OP-carbocyclic aryl)-3-(carbocyclic aryl)-2,3-dihydrobenz[d]isothiazole-1,1-dioxides (and -2,3- dihydronaphtho[1,8-de]-1,2-thiazine-1,1-dioxides) by reacting (a) a 3-(4'-OP-carbocyclic aryl)-benz[d]isothiazole-1,1- dioxide wherein P is a protecting group or a 3-(4'-OP- carbocyclic aryl)-naphtho[1,8-de]-1,2-thiazine-1,1-dioxide wherein P is a protecting group and (b) a carbocyclic aryl- lithium compound to give (c) the corresponding 3-(4'-OP- carbocyclic aryl)-3-(carbocyclic aryl)-2,3-dihydrobenz[d]- isothiazole-1,1-dioxide or the corresponding 3-(4'-OP- carbocyclic aryl)-3-(carbocyclic aryl)-2,3-dihydronaphtho- [1,8-de]-1,2-thiazine-1,1-dioxide. In another aspect, the present invention relates to the 3,3-disubstituted-2,?-dihydrobenz[d]isothiazole-1,1- dioxides and the 3,3-disubstituted-2,3-dihydronaphtho[1,8-de]- 1,2-thiazine-1,1-dioxides produced by the above-described method provided the 3,3 substituents are different, which compounds are useful in the synthesis of phenol and 1-naphthol sulfam(na)phthaleins employed, for example, as photographic optical filter agents and filter agent precursors.

311909

Affiliated with

Also associated with

Rating

Synthesis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-85281